Are there living things on different galaxies?

 

The fact that we haven’t found life elsewhere yet doesn’t mean that such life does not exist. Searching for life is really hard, even in the Solar system, so it could be that there is life very near by. We just haven’t found it yet. Slot Online Terpercaya

My own guess is that there probably is life elsewhere in the Universe – and the reason for that is just how ginormous the universe is.  Togel Hari Ini

In our Solar system alone, there are lots of places life could exist

Let’s go for a tour of the Universe, starting at home, in the Solar system…

When you learn about the Solar system at school, you’ll learn about the eight planets – Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune – and that’s probably about it.

In fact, the Solar system contains an immense number of objects. We know of hundreds of thousands of asteroids, and think there may be more than ten trillion comets, held in cold storage around the Sun, halfway to the nearest star. Ten trillion is 10,000,000,000,000. That’s a lot of comets, all made of ice and dust! Of the many objects in the Solar system, we think the best places to look for life are those that have liquid water, or had it in the past. Why? Well, on Earth, everywhere we find water we find life, so it seems natural to search where liquid water is present!

Mars is our main target, and we keep sending spacecraft to try to find out if there was ever life there.

But there are a growing number of other targets – moons orbiting the giant planets that have vast oceans of liquid water, buried deep underground.

Around Jupiter, we know that Europa, Ganymede and Callisto have oceans, each of which has more water than the Earth. Saturn’s moons, too, have oceans – with tiny Enceladus perhaps the most surprising place that we’ve found liquid water. So, in our Solar system alone, there are loads of places that we think life could exist – and we’re busy looking to see if it is there.

A Universe full of planets

But the Solar system is just one of an immense number of planetary systems. The Sun is one of around 400 billion stars in our galaxy, the Milky Way. That’s 400,000,000,000 stars. And since I was a kid, we’ve learned that almost every star has planets.

What does this mean? Well, if we guess that each star has eight planets (like the Sun), then if there are 400,000,000,000 stars in the galaxy, there will be 3.2 trillion planets (3,200,000,000,000, which is 200 billion groups of eight).